Jens Ziegler, Markus Graube, Alexander Suhrbier, Niels Wessel, Hagen Malberg, Leon Urbas. The influence of the spatial separation of control elements on the workload for mobile information systems. In Markus Bylund, Oskar Juhlin, Ylva Fernaeus, editors, Proceedings of the 13th Conference on Human-Computer Interaction with Mobile Devices and Services, Mobile HCI 2011, Stockholm, Sweden, August 30 - September 2, 2011. pages 191-200, ACM, 2011. [doi]